Razz resources?

[Toronto86er]

Well I've got plenty of experience in holdem and the pot odds needed to survive there, but always sort of memorized odds instead, ie 4:1 once for a FD, ~7:1 for a gutshot etc etc.

I get the feeling that in razz, you'd have to a) remember the important mucked cards and b) calculate your odds based on seen an unseen cards. That could prove to be a little tough for me so I was hoping there was a simpler formula or something. I'll pick up SoP asap.